package com.sky.service.impl;

import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    @Override
    public PageResult page(CategoryPageQueryDTO categoryPageQueryDTO) {
        Page<Category> p = Page.of(categoryPageQueryDTO.getPage(), categoryPageQueryDTO.getPageSize());
        Page<Category> page = lambdaQuery()
                .like(categoryPageQueryDTO.getName() != null, Category::getName, categoryPageQueryDTO.getName())
                .eq(categoryPageQueryDTO.getType() != null, Category::getType, categoryPageQueryDTO.getType())
                .page(p);
        return new PageResult(page.getTotal(), page.getRecords());
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Category category = Category.builder()
                .id(id)
                .status(status)
                .build();
        categoryMapper.updateById(category);
    }

    @Override
    public void save(CategoryDTO categoryDTO) {
        Category category = Category.builder()
                .name(categoryDTO.getName())
                .sort(categoryDTO.getSort())
                .type(categoryDTO.getType())
                .status(StatusConstant.DISABLE)
                .build();
        categoryMapper.insert(category);
    }

    @Override
    public void update(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO, category);
        categoryMapper.updateById(category);
    }

    @Override
    public List<Category> list(Integer type) {
        return lambdaQuery()
                .orderByAsc(Category::getSort)
                .orderByDesc(Category::getUpdateTime)
                .eq(type != null, Category::getType, type)
                .list();
    }

    @Override
    public void deleteById(Long id) {
        //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
        Integer count = dishMapper.countByCategoryId(id);
        if (count > 0) {
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
        count = setmealMapper.countByCategoryId(id);
        if (count > 0) {
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        categoryMapper.deleteById(id);
    }
}
